Troubleshooting - Huawei SUN2000-45KTL-US-HV-D0 User Manual

SUN2000-45KTL-US-HV-D0
User Manual
Item
Grounding
reliability

9.2 Troubleshooting

Alarm severities are defined as follows:



Table 9-2 Common alarms and troubleshooting measures
Alarm ID Alarm
Name
103 High DC
Input
Voltage
Issue 02 (2017-09-15)
Check Method
Check that the idle COM, USB, and

AC OUTPUT ports are locked by
waterproof caps.
Check that ground cables are securely
connected.
Major: The inverter enters the shutdown mode and disconnects from the power grid to
stop generating electricity after a fault occurs.
Minor: Some components are faulty but the inverter can still generate electricity.
Warning: The inverter output power decreases due to external factors.
Alarm Possible Cause
Severity
Major Cause ID = 1

The PV array is not
properly configured.
Excessive PV modules are
connected in series to PV
strings 1 and 2, and
therefore the PV string
open-circuit voltage
exceeds the inverter
maximum MPP voltage.
Cause ID = 2

The PV array is not
properly configured.
Excessive PV modules are
connected in series to PV
strings 3 and 4, and
therefore the PV string
open-circuit voltage
exceeds the inverter
maximum MPP voltage.
Cause ID = 3

The PV array is not
properly configured.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
9 System Maintenance
Maintenance Interval
months to a year.
The first inspection is
half a year after the
initial commissioning.
From then on, perform
the inspection once six
months to a year.
Suggestion
Cause ID = 1

Reduce the number of PV
modules connected in series to
PV strings 1 and 2 until the
open-circuit voltage is less than
or equal to the maximum inverter
input voltage. After the PV array
configuration is corrected, the
inverter alarm disappears.
Cause ID = 2

Reduce the number of PV
modules connected in series to
PV strings 3 and 4 until the
open-circuit voltage is less than
or equal to the maximum inverter
input voltage. After the PV array
configuration is corrected, the
inverter alarm disappears.
Cause ID = 3

Reduce the number of PV
modules connected in series to
PV strings 5 and 6 until the
open-circuit voltage is less than
82